Optical disk players having readback circuits with noise rejecti

Details Optical disk players having readback circuits with noise rejecti Optical disk players having readback circuits with noise rejecti

1990-10-01

1992-11-17

Psitos, Aristotelis

Dynamic information storage or retrieval

Binary pulse train information signal

Binary signal gain processing

360 45, H04N 576

Patent

active

051650894

ABSTRACT:
In an optical disk player, such as for a magnetooptic player, wherein the data recorded on the optical medium are at recording at such high densities then intersymbol interference causes the peaks of the readback signals to become closer together resulting in phase errors. A transition selecting means is operative to select a transition indicated by the readback signal or a substitute transition indicated by a timed delay means generates a signal based upon the immediately preceding transition received from optical medium. Various embodiments of the invention are illustrated.

REFERENCES:
patent: 3483539 (1969-12-01), Poumakis
patent: 3879752 (1975-04-01), Heidecker
patent: 4907100 (1990-03-01), Nishiyama et al.
patent: 4937687 (1990-06-01), Sengoku
patent: 5003408 (1991-03-01), Farkas et al.

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